Adjustable duplex tip holder



1 Get, 4, 1949.

H. A. HUFF, JR, ET AL ADJUSTABLE DUPLEX TIP HOLDER Filed Aug. 29, 1944 ROKE fT/W. fwd E and ATTORN EY5 Patented Oct. 4, 1949 ADJUSTABLE DUPLEX TIP HOLDER Harry A. Huff, Jr., Jersey City, and Robert M.

Roche, Long Branch, N. J., assignors to Air Reduction Company, Incorporated, a corporation of New York Application August29, 1944, Serial No. 551,676

' Claims. 1.

This invention relates to gas cutting torches and more particularly to an attachment for simultaneously making parallel cuts, as when cutting slots in a work-piece or when cutting a work-piece into strips.

It is an object of the invention to provide an attachment "for a standard torch with which parallel cuts can be made with a single pass of the torchover the work-piece.

It is another object of the invention to provide such as an attachment for torches which is readily adjustable to different spacings of cut.

According to the invention, the attachment comprises a duplex holder adapted to be secured to the'torch head in the same manner as a standard tip is secured thereto. Two parallel gas tubes of soft copper extend from each of two opposite sides of the holder which can be bent to locate tips carried on each two of them at a desired spacing. Once the tips are so located a spacer is secured in place over the tip heads to retain the tips in the adjusted position. For making cuts of different distances apart, either different length spacers or an adjustable spacer is used.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawings, in which Fig. 1 is a perspective view of. the attachment connected to the torch head and il ustrating with dotted lines how the gas tubes are bent to separate the tips farther apart, different length spacers being used for the different spacings;

Fig. 2 is a cross-sectional view taken through the duplex holder and one of the tip heads;

Figs. 3 and 4 are respectively elevational and plan views of the adjustable spacer, the latter view showing in section the swivel connection of one end of the spacer with one tip head; 7

Figs. .5 and 6 are respectively detail views-of the clamping head and its spindle.

Referring now particularly to Figs. 1 and 2. there is shown a torch body ll having the usual torch head J2 which ordinarily receives the usual cutting torch tip. To the head 12 there is attached, in the same manner that the usual cutting torch tip is attached to the head, the adjustable duplex cutting attachment l3 of the present invention. This attachment includes a duplex holder M having a pipe connection :5 with conical seat portions l6 adapted to fit against corresponding seat portions within the torch head 12 so that cutting gas is delivered to a central passage I! and heating gases are delivered to mixed gas passages I8.

Pipe connection 15 is secured to torch head 12 by a standard tip nut is and at its opposite end to the duplex holder 14 bya reduced threaded portion 2% of the connection l5. Shoulder portion 2! of connection !5 partially enters recess 22 to provide space about threaded portion 20 to receive the mixed gases from mixed gas passages l8. Packing 24 is retained in recess 22 and about shoulder portion 2! by packing nut 25. Cutting and heating gases pass respectively to passages 25, 2'! or the duplex holder M.

Extending, respectively, from opposite sides of the duplex holder i i are two flexible tubes :28, 29 for respectively carrying cutting oxygen and mixed heating gases from holder passages 2B, 21 to tip heads 39. Each tip head 3! is fashioned internally similarly to thetorch head i 2 and is adapted to receive a standard cutting tip 3!. Since there are two tubes extending from each of two opposite sides of the holder 14, two cutting tips which will be adjustable toward or away from each other are provided, the tubes 28 and 28 being flexible. The tubes are preferably formed of soft copper and are silver soldered as indicated, respectively, at 32 and 33. to the duplex holder l4 and tip head 3.9. The tips 3! are secured within the tip head 3! by usual tip nuts 34.

Once the tips 5! have been adjusted to the desired spacing, they are retained in the adjusts ed position by a spacer 35 having openings 36 in which the tip heads Bil are inserted. Set screws 3? enter the openings 36 to firmly se cure the spacer 35 to the tip heads. The spacer 35 has sufficient bearing surface to prevent rotation of the tip heads within the openings 36 and to maintain the tips in parallel relation. When another adjustment of the tips is made, a second or different spacer 35'. shown in dotted lines in Fig. 1, is used.

Referring .now to Figs. 3 to 6, there is shown an adjustable spacer 38 which can be used in place of the fixed-length spacers 35, 35'. This spacer 35 includes a connecting shaft 39 having right-hand and left-hand threads on opposite ends thereof and a hand portion i! for turning the threaded shaft within spindles 42 pivotally retained on clamping heads 43. Clamping heads 43 are finally secured to the tip heads 38 by U- bolts 44 and nuts 45, 46.

On turning the threaded shaft 39, tips 3| are either brought closer together or moved farther apart to set the tips to a new spacing. The

3 threaded shaft 39 will be adjusted to extend to a greater or less extent through spindle 42, Fig. 4. The spindle 42 has a bearing portion 41 which is pivotally contained in an opening 48 of the clampin head 43.

It should now be apparent that there has been provided an attachment adapted to be rigidly connected to a standard torch through which cutting and heating gases may be passed to parallel tips 3! thereof so that with the tips ignited and cutting oxygen turned on, parallel cuts will be made into a work-piece by a single pass of the torch over the work-piece. With such an attachment, strips can be taken from the workpiece or slots having parallel sides can be readily formed therein. It should also be apparent that the attachment is one which is adjustable to provide different widths of out.

What is claimed is:

1. An attachment for gas cutting torches of the type in. which the tapered inlet end of a tip is removably clamped in a conical seat in torch head by a tip nut and in which cutting oxygen is delivered by the head to one passage in the tip and preheating gases are delivered by the head to other passages in the tip, said tachment comprising a holder having a conical. inlet end adapted to mate with said conical seat in the torch head when the tip of the torch is removed, a tip nut for clamping the conical end of said holder in said seat, said holder having a cutting-oxygen passage for receiving cutting oxygen from the torch head and preheat passages ior receiving preheating gases from the torch head, two pairs of flexible tubes extending from the holder, two tip heads to each of which one pair of said flexible tubes are connected, each of said tip heads having a conical seat, a removable tip for each of said tip heads having a tapered inlet end adapted to be received by the conical seat in the corresponding tip head, and a tip nut for removably clamping each tip to its tip head with the tapered inlet end of the tip engaging in the conical seat of the tip head, said tips each having a cutting-oxygen passage and preheat passages, and the tip head for each tip together with the two flexible tubes leading to it from said holder serving to place the cutting-oxygen passage of such tip in cornmunication with the cutting-oxygen passage in said holder and the preheat passages in such tip in communication with the preheat passages in the holder. 7

2. An attachment in accordance with claim 1 in which said flexible tubes are adapted to be bent to alter the spacing of the two tips mounted in the tip heads and having means connected between such tips for retaining them in their adjusted spaced relation.

3. An attachment in accordance with claim 1 in which said flexible tubes are adapted to be bent to alter the spacing of the two tips mounted in the tip heads and having an ad- J'ustable spacer connected between such tips for adjusting them to the different spacing and for retaining them in their adjusted spaced relation.

4. An attachment for connection to a cutting torch when the torch is to be used for the simultaneous cutting of two separate kerfs, said attachment including a holder, a seat portion on the holder that is adapted to fit into a torch head in place of a, cutting tip with which the torch is used when cutting a single kerf, a detachable fastening element for connecting the seat portion with the torch head, two spaced cutting torch assemblies each of which comprises a head and a cutting tip carried thereby, gas tubes connecting the heads of said spaced torch assemblies with the holder, a spacer with openings at its opposite ends and into which portions of the respective torch assemblies extend, each of said openings having a side wall against which the adjacent torch assembly is held and by which the torch assembly is held in the desired relationship to the other torch assembly both as to spacing and direction of cutting, and clamping elements urging the respective torch assemblies against the side walls of the openings through said spacer.

5. A cutting torch attachment for making parallel cuts, said attachment comprising a holder, a seat portion on the holder that is adapted to fit into a torch head in plac of a cutting tip with which the torch is used for making a single cut, a tip nut for connecting the seat portion with the torch head, two torch heads, two bendable gas tubes extending from one side of the holder to one of said heads, two similar bendable gas tubes extending from the other side of the holder to the other of said heads, separate tip structures detachably connected with the respective heads, a spacer with openings at its opposite ends and into which the respective tip structures extend, a concave cylindrical surface around at least a portion of the side of each opening, the axes of the cylindrical surfaces being parallel, clamping means on the spacer at each. opening for clamping the tip structures against said cylindrical surfaces to retain the tip structures in parallel spaced relationship, and a threaded element on the spacer operable to change the spacing of the openings from one another.

HARRY A. HU'FF. JR. ROBERT M. ROOKE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,142,667 Calhoun June 8, 1915 1,808,968 Plumley June 9, 1931 1,958,044. Hendricks May 8, 1934 2,188,637 Walker Jan. 30, 1940 2,202,130 .Vagner May 28, 1940 2,305,909 Stoneberg Dec. 22, 1942 2,334,250 Cassens et al. Nov. 16, 1943 2,378,346 Wigton June 12, 1945 FOREIGN PATENTS Number Country Date 145,163 Great Britain June 30, 1920 OTHER REFERENCES The Iron Age, April 24, 1941, pp. 60, 6 1, 62. 

